Valve arrangement



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I E.. M. @FGM-IIT VALVE ARRANGEMENT Filed July lO 1920 www w Patented May l, 1923.

i `U N l T E D l `S T VALVE ARRNGEMENT.

Application :tiled July 10, 1920. Ferial lilo. 395,322.

To @ZZ whom it may concern:

Be it `known that l, lili/rou A. VVMGHT, a citizen ot the United States, residing at Chicago, in the county of Cook and State of lllinois, have invented certain new and use- Ylul` lmprovements in Valve Arrangements, ot which the following isa specitication.

'Fhis invention relates to a valve arrangement particularly adapted tor use in connection with internal combustion engines.

One object ofthe invention is to provide a slide valve which will properly `function within the valve chamber without any cramping action `whether or not the valve stem isaccurately positioned with respect to the valve or the bore oit the valve chamber.

Another object is to provide an operative connection between a slide valve and its stem for compensating for any irregularity between the parts.

Another object is to provide a simple and eflicient oiling arrangement tor the valve stem. i

rlhese andother objects are accomplished by means ot' the'arrangements disclosed on the accompanying sheet oi drawings, wherein Figure 1 Vis a longitudinal sectional view of an internal combustion engine embodying my invention;

Figure 2 is a reduced sectional view ot the same, the section being taken through the valve chamber at right angles to that shown in. Figure 1 i Figure 3 is a sectional view ot the valve shown on `.an enlarged scale and taken in the plane oft line 3 3 or Figure l1;

Figure 4 is a top plan view of the same valve; and, i

Figure 5 is a fragmentary side elevation of the valve shown `on the same scale as appears in Figure 1.

rFhe various novel features of the invention will be apparent trom the following description and drawings and will be particularly pointed out in `the appended claims. i i i Referring tothe -figures ot the drawings, it will be noted thatl have disclosed my inventionin connection with an internal combustion engine having a cranlr case 10, a cylinder 11 and a piston 12 mounted for re ciprocation within the latter. Preferably integrally formed at one side ot, the cylinder 'lljis a valve chamber.V 13 which, it will be noted, has the usual admission and exhaust ports 8 and 9, respectively, there being a passageway 11- extending between said valve chamber and the explosion chamber ot the cylinder 11. it spark plug 15 is provided by means of which the explosive charges are ignited for forcing the piston 12 on its working stroke. rlhe inlet and exhaust openings o'l the valve chamber 13, and also the passageway 14C, are controlled by a slide valve 16, which is hollow and cylindrical in shape and split throughout its length, whereby said valve yieldably engages the inner walls ot the valve chamber 13 to prevent the lealrage of gases, it being understood that the slit 17 in the valve is located in a posi* tion with respect to the walls of the valve chamber to permit the valve to function properly. @ne end ot the valve chamber 13 is provided with an opening 18 which also extends through a boss 19 formed at the end ot the valve chamber 13. Mounted within the boss 19 is an outer sleeve or bushing 20, within which is mounted an inner sleeve 21. Slidably mounted within these concentrically arranged sleeves is the valve stem 22. The valve stem `may be actuated in any suitable manner through any suitable mechanism.

llt is not unusual to have a condition in internal combustion engines ot the slide valve type wherein the valve is caused to be cramped within the valve chamber, primas rily as a result of an irregular linish ol the internal surface oi' the valve chamber, and especially so when the piston stem is not in arial alignment or in proper parallelism with respect to the piston. To prevent cramping of the piston within the piston chamber and otherwise to provide a suitable and eiiicient connection between the valve 1b and its stem 22, l have provided a compeneating arrangement, including two holding members 24C and 25 having adjacently arranged grooves upon their arcuate ends serving to form a pair of oppositely located arc-- uate grooved channels 26 ttor the reception of a circular 4flange 27 arranged on the interior surface ot the valve 16, rFhe channelshaped groove 26 is made sufficiently large to loosely receive the annular flange 27, permitting a certain amount of play between the holding members and the valve and the tlange thereof. rlhese holding members 24C and 25 are secured to each other in any suitable manner, suoli as by screws 28, and are also secured to one end ot the valve stem 22 and held against rotation thereon by a key connection 29. The connection between the valve stem 22 and the members 25 preferably is a rigid one. However, by means of the loose connection between the valve holding members 24: and 25 and the valve 16, the valve will properly reciprocate within the valve chamber 13 without any cramping action whatsoever whether or not the valve stem 22 and the internal circular surface of the valve chamber 13 are accurately concentrically arranged. Also by having the valve split throughout its length the same is made yieldable and is adapted to function ing thermo and mechanical conditions. As shown in Figure 4l, the split is located adjacent one of the arcuate ends of the holding member and the valve member is retained against rotation by a pin fitting into the split.

`To properly lubricate the valve stem, as mentioned hereinabove, I have provided the bushing 20, which fits within the valve chamber boss 19, and within the bushing 20 is placed an inner sleeve 21 which slidably receives the valve stem 22. It will be noted that the inner sleeve 21 is spool-like to provide an annular space 30 between the inner and outer members 21 and 20. This annular space 30 is maintained full of oil, which is supplied through registering apertures 31 and 32 in the bushing 20 and valve chamber boss 19, and preferably directly opposite these apertures and registering with the annular oil chamber 30, is an opening 33 in the inner spool-like sleeve 21 for permitting the passage of a lubricant to the valve stem within said inner sleeve. It will be noted that the outer sleeve 20 is longer than the inner spool-like sleeve 21, thereby providing an annular space 34 which receives any suitable packing 35 for preventing leakage of the oil or lubricant along the valve stem.

` By means of the arrangement disclosed in this application the slide valve is connected to its valve stem in a manner to prevent cramping of the valve and to cause a proper functioning of the latter regardless of irregularities,'and the valve stem is reciprocated in an improved housing, including parts whereby the stem may be maintained in an oiled condition in a manner to meet all of the requirements for successful commercial operation.

It is my intention to cover all of the modilications of the invention falling wit-hin the spirit and scope of the following claims.

claim:

l. In an internal combustion engine, a hollow cylindrical slide valve split throughout its length, a valve stem, and a holding memberv supporting the valve upon the stem in such manner as to permit a limited relative lateral movement of the valve and stem,

under varysaid holding member being provided with axial openings through which a fluid passes during normal operation of the engine.

2. In an internal combustion engine, a hollow cylindrical slide valve split throughout its length, a valve stem, and a holding member having arcuate ends adapted to engage opposite portions of the valve to support it upon the stem in such manner as to permit a limited movement of the valve relative to the stem, said holding member being provided with axial openings through which a fluid passes during normal operation of the engine.

3. In an internal combustion engine, a hollow cylindrical slide valve having an in wardly extending flange, the valve being split throughout its length, a valve stem. a valve holding member rigidly secured to the valve stem and having arcuate arms vprovided with channels adapted to engage the flange upon the valve at diametrically opposed points and to loosely retain the valve connected to the valve stem, said holding member being spaced from the valve intermediate the arcuate portions to permit the passage of fluid during normal operation of the engine. e

4. In an internal combustion engine, a hollow cylindrical slide valve having an inwardly extending flange, the valve being split throughout its length, a valve stem, a valve holding member rigidly secured to the valve stem and comprising two similar members secured together, the members being provided with arcuate arms having opposed grooves, the grooves forming channels adapted to engage the flange upon the valve at diametrically opposed points and to loosely retain the valve connected to the valve stem, said valve and holding member being spaced at points to permit the passage of fluid during normal operation of the engine.

5. In an internal combustion engine, a hollow cylindrical slide valve having an inwardly extending flange, the valve being split throughout its length, a valve stern, a valve holding member rigidly secured to the valve stem and having arcuate arms provided with channels adapted to engage the flange upon the valve at diametrieally opposed points and to loosely retain the valve Connected to the valve stem, said holding member being spaced from the valve intermediate the arcuate portions to permit the passage of fluid during normal operation of the engine, the split of the valve coming opposite one of the arcuate arms and the arm being provided with a pin .fitting into the split to restrain the valve from rotation.

Signed at Chicago, Illinois, this 29th day of June, 1920.

ELTON A. WRIGHT. 

